A simulated annealing approach to integrated production scheduling

This paper describes an approach to manufacturing planning that seeks to integrate both process planning and scheduling. We show that separating these two related tasks, as is the common practice, can impose constraints that substantially reduce the quality of the final schedule. These constraints arise from premature decisions regarding operation sequence and allocation of manufacturing resources. Having formulated an integrated process planning and scheduling problem, we describe a solution technique based on simulated annealing. We compare this approach with others reported in the literature, considering both their generality and performance. In particular, we perform a detailed empirical comparison between simulated annealing and the popular technique of dispatching rules. Our results, achieved with two distinct sets of example problems, show that simulated annealing can produce solutions of significantly higher quality than those achieved through a published dispatching rule approach.     

木质素磺酸钙在柔性喷层中的应用

介绍了木质素磺酸钙对喷层混凝土必影响及在红庙矿支护工程中的应用效果。     

基于行波模型的航天器附件动力吸振分析

将航天器梁式柔性附件的振动作为波动研究，建立附件端点带单自由度动力吸振器的航天器行波动力学模型。根据附件的等效单自由度模型设计吸振器参数，以获得最优的减振效果。结果表明，动力吸振可明显降低附件弹性振动的峰值，改善姿态运动特性，同时，行波模型具有方便局部模型修改的特点。     

大容量软盘驱动器定位系统的研究

本文分析了开发大容量软盘驱动器定位系统的关键技术，给出了一种扇段伺服定位系统，对其快速高精度定位机理进行了详细探讨。     

应用铝制导电电极臂降低炼钢成本

导电臂是电弧炉的基本组成部分，铝制导电电极臂可以提高钢产量，降低炼钢成本，给电炉钢厂带来巨大的经济效益。目前德国巴登钢钢铁公司两座电弧炉使用铝制导电臂，都能得到１０％以上的超额有效效率。     

Effects of level of cooperative choice by the other player on choices in a prisoner's dilemma game. Part II.

This study tests whether very high (or very low) cooperation by the other, sequential change in level of cooperation by the other, and degree of S's "flexible ethicality" will influence level of cooperative choice by 40 male and 40 female human Ss. The design is a mixed analysis of variance type with 3 independent and 2 nonindependent sources of variance. The main findings were that cooperative choice is influenced by a very high level of cooperation by the other, but even more by a sequence of low to high cooperation by the other. Flexible ethicality influences choice but in a complex association with sex and sequence. Essentially, then, communication is possible through reiteration of the Prisoner's Dilemma game. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

地下室漏水原因分析与改进措施

根据地下室出现漏水的状况，分析了地下室漏水的各方面原因，着重对结构自防水和柔性防水层的建筑构造方法提出了改进与完善措施，保证了整个建筑基础结构的耐久性。     

一类柔性制造系统的运行特性

柔性制造系统是一类重要的离散事件动态系统,它的运行特性分析及系统优化已引起了广泛的注意。本文研究 Cohen 模型描述的一类柔性制造系统的运行特性,着重分析系统的加工时间矩阵与系统运行效率的关系。应用本文的结论,可以找到一大类具有相同运行效率的柔性制造系统,这对于系统的优化是有意义的,文中的例子不仅证实了各种结论,而且对于生产线上的排序问题有启发意义。     

基于ANN-MC方法进行弹性机构的动态强度可靠性分析

弹性机构强度可靠性和运动可靠性是工业机器人、空间操作臂等领域最为关注的问题,而精确实用的可靠性分析方法是解决此问题的关键。本文在弹性机构动力学有限元分析的基础上,引入构件尺寸和运动副摩擦等随机变量,获得弹性机构随机动态应力的时间历程;将蒙特卡罗法(Monte-Carlo,MC)与人工神经网络结合(artificial neural network,ANN),形成了基于小样本对弹性机构动态强度可靠性进行计算的ANN-MC方法;将该方法用于曲柄滑块机构的动态强度可靠性计算,获得其动态强度可靠性为99.10%。本文方法不仅节省了计算时间,而且提高了动态可靠度求解精度。     

含柔性长链的二元胆甾相新型液晶的制备及其性能研究

以胆甾醇和长链二元酸为原料，合成了一种柔性长链的新型小分子二元胆甾相液晶，并对其相转变过程进行了深入分析。红外光谱、核磁共振谱、质谱和元素分析证实了其分子结构，差示扫描热分析（DSC）谱图和偏光显微镜（POM）观察图像等一致表明其相转变过程完全符合胆甾相液晶的特征。说明胆甾相液晶分子的刚性大小与胆甾相液晶的形成没有直接关系，胆甾相液晶基元是其形成有序排列的决定因素。